THE CANADIAN ENTOMOLOGIST. 



After first moult, in spring : Length .n inch ; color brown-green ; the 

 spines in number and position as at maturity, and as in" the genus, black, 

 as well as the tubercles from which they spring ; beset with many short, 

 divergent, black bristles ; head obovoid, black, with black hairs. Dura- 

 tion of this stage about 10 days. 



After second moult : Length .16 inch ; color gray-black with a green 

 tint over upper side ; under side pale green ; the spines black, with black 

 bristles ; all the tubercles pale yellow ; head as before, black. To next 

 moult about 14 days. 



After third moult : Length .32 inch ; color gray mottled with black; 

 a double dorsal stripe of gray ; spines black ; the bases of dorsal rows 

 black on dorsal side, but yellow on outer side ; of middle and lower rows 

 dull yellow ; head as before, but reddish-yellow, the back less red, more 

 yellow. To next moult about 10 days. 



After fourth moult : Length .5 inch ; very much as at last previous 

 stage, the dorsal lines same, spines same. To next moult about 6 days. 



After fifth moult : Length .74 inch ; slender; color brown-black, with 

 a dorsal band of grayish-brown and not clearly defined markings else- 

 where ; these markings became distinct as the stage progressed. 



Mature Larva. — Length 1.5 inch; slender, somewhat thickened in 

 middle, the segments well rounded ; on dorsum a broad greenish-yellow 

 band, with a black line through the middle, edged by a little green ; a 

 narrow greenish-gray band between the dorsal and middle rows of spines, 

 and a short band between the base of each dorsal spine and the next in 

 advance of the middle row ; these gray bands are of irregular width and 

 the edges are whitish ; the spaces between the bands brown-black ; the 

 sides, from middle row to the outside of lower row, gray with a rust-red 

 tint in the middle of this area, and below to feet a darker, or more brown 

 shade of gray ; the spines are rather slender, swollen next base, above this 

 tapering to a small conical top, from which proceeds a straight bristle ; a 

 few bristles about the sides, each from a tubercle, and standing at about 

 45 with the axis of its spine ; the dorsal row are gray, the middle row 

 gray tipped with rust-yellow, the lower row all rust color of deep shade ; 

 feet black, pro-legs gray-brown ; head sub-cordate, the vertices rounded ; 

 color dull dark brown in front, dull yellow at back, with many short black 

 hairs. From fifth moult to pupation 9 days. 



